Thegrepcommand is famous in Linux andUnixcircles for three reasons. Firstly, it is tremendously useful. Secondly, thewealth of options can be overwhelming. Thirdly, it was written overnight to satisfy a particular need. The first two are bang on; the third is slightly off. Ken Thompsonhad e...
Most experienced administrators consider cron to be vital to the system because it can perform automatic system maintenance. For example, cron runs log file rotation utilities to ensure that your hard drive doesn’t fill up with old log files. You should know how to use cron because it’s ju...
In the navigation pane on the left, chooseServers. In theStatuscolumn, view the connection status of the source server. Linux Use PuTTY or another SSH client to log in to the source server. Runps -ef | grep -v grep | grep linuxmainto check whether the Agent is running properly. ...
For this chapter, you should log in as the regular user. 安装Linux 时,除了 root 用户外,还应创建至少一个普通用户,这就是 你的个人账户。 在本章中,你应以普通用户身份登录。 2.2.1 The Shell Window(shell 窗口) After logging in, open a shell window (often referred to as a terminal). The...
Grep is a short form for global regular expression print. It is a helpful tool that Linux system engineers use when looking for a text or pattern in ordinary files and the system. Grep is a fundamental command in Linux and Unix. The grep command can be u
A Linux system (this tutorial usesUbuntu 22.04). Access to the terminal. A user account withsudoorroot privileges. What Are Linux Log Files? All Linux systems create and store information log files forbootprocesses,applications, and other events. These files are a helpful resource for troubleshoo...
grep -E "player1|player2|player3" server.log >player_activity.log But I'm tired of modifying that line and would just like to draw from my known player list in a different file. I want it to substitute the "player1|player2|player3" with looking through a white-lis...
Introduction to atop atop is a monitor for Linux that can report the activity of all processes and resource consumption by all processes at regular intervals. It shows system-level activity related to the CPU, memory, disks, and network layers for every process. It also logs system and process...
cat /var/share/oss/*/MOOpsAgentService/config/syndic.properties | grep 'enable_syndic_http_static_file_server' To disable HTTP downloads for the MOOpsAgent static file server, set enable_syndic_http_static_file_server in 7.c to False. Restart moopsagentservice. Enter moopsagentservice in the...
Suppose we have the file auth.log (/var/log/auth.log). To find the last occurrence of a string (uid=0), we can use the command: $sudogrep“uid=0” auth.log|tail-1 The output will be as shown below: The command is relatively simple. We start by finding the string we require us...